Tire-shrinker.



No. 843,392. PATENTED PEB. 5, 19o?.

. W. yH. FRANCIS.

TIRE SHRINKER.

APPLIGATION FILED 00122, 1905.

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PATENTED PEB. 5, 1907.

W. H. FRANCIS. TIRE SHRINKBR.

APPLICATION FILED O0T.2. 1905.

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WILLIAM H. FRANCIS, OF HUGO, INDIAN TERRITORY.

TIRE-SHRINKER.'

Specification of Letters Patent.

Patented Feb. 5,1907'.v

Application filed October 2, 1905. Serial No. 281,074.

To coll whom, it may concern:

Be it known that I, WILLIAM II. FRANCIS, a citizen of the United States, residing at Hugo, in the Choctaw Nation, Indian Territory, have invented certain new and useful Improve- Inents in Tire-Shrinkers and I do hereby ldeclare the following to be a full, clear, and exact description of the invention, such as will enable others killed in the art to` which it appertains to make and use the same.

This invention relates to tire-shrinkers.-

One object is to provide a device of the character stated embodying such characteristics that the tire may be shrunk without necessarily heating the same.

Another object of the invention resides in the provision of a tire-shrinkerembodying, among other characteristics, the feature of simplicity, inexpensiveness, durability, and effectiveness.

With these and other objects in view the present invention consists in the combination and arrangeirent of parts, as will be herein, after more fully described, shown in the accompanying drawings, and particularly pointed out in the appended claim, it being understood that changes in the form, proportion, size, and minor details may be made within the scope of the claim without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings, Figure lis a side elevation of my invention. Fig. 2 is a top plan view. Fig. 3 is a longitudinal sectional view. Fig, 4 is a transverse sectional view.

Referring now more particularly to the accompanying drawings, the reference characters 1 and 2 designate end posts, each having a bifurcation 3 in its lower end and rovided with side flanges 4 and 5, the side' langes of the post 1 being designed to inclose the vertically-movable rack 6, which is held between said flanges through the instrumentality of a suitable pin 7, as shown. The post 1 is also provided with upper and lower slots 8 and 9, respectively, for a purpose presently explained.

Connecting the posts 1 and 2 are side members 10 and 11, the upper opposite edges of the said side members 10 and 11 being curved downwardly at adjacent ends, as shown, for

' engagement with the inner faces of the flanges 4 and 5 and in alinement with the aforesaid bifurcation 3 of the post 1. The opposite edges of the side members 10 and 11 engage the inner faces of the flanges 4 and which slots are designed to aline with each other for a purpose presently explained.

Fitted upon the upper end of the post 2 'and the upper edges of the side members 10 and 11, at one end thereof, is a fixed head 14 which is arranged upon an incline and provided with overhanging side flanges 15 and 16, which terminate short of each other in an inwardly-divergent plane to form guides for the oppositely-disposed jaws 17 and 18, respectively. The side webs 19 of the fianges 15 and 16 are arranged upon the incline for coperation with the corresponding inclined side of the jaws 17 and 18.

It will be observed tf at the upper edges of the side members 10 and 11 are concaved, as at 20, whereby the aforesaid lead 14 might be disposed upon an incline directly opposite to the inclination of a movable liead 21, which'is mounted also upon the side members l0 and 11 for cooperation with the fixed lead 14. This movable bead 21 also has a overbanging side flanges 22 and 23, which j terminate short of each other upon an 1n-r wardlyconvergent plane, as shown. These overhanging flanges 22 and 23 of the movable head 1 are designed to receive tite clampingjaws 24 andv 25, wilich latter slide in said flanges of the movable liead. In order to facilitate the movement of the sliding jaws 17 and 18 and 24 and 25 in tleir respective heads, I provide bearing-balls 26, wl: ich are leld in a groove 27 of the side walls of the overhanging .flanges and prevented from leaving said grooves 27 by means of abutments 28 at opposite ends of each overhanging flange.

In order that the movable head 21 may f ave sliding movement upon tle upper edges of tle side members 10 and 11, I provide the lead with a depending member 29, which .extends downwardly between tite side memwhich is arranged upon an upward incline IOO llO

between the side members 10 and 11 and bi.- furcated at one end, as at 33, for pivotal connection with thelower end of the aforesaid rack 6, the opposite end of the said lever 32 being pivotally mounted in any suitable manner between tlie corresponding ends of two linksy 34 and 35, which embrace the depending end 29 of the movable aw 21, and alsol the depending portion 31 of tie fixed jaw 14 andpivotally connected to a suitable pin 36, which latter is mounted in tite side flanges 4 and 5 of the post 2. The operatinglever 37 is pivoted between tlle` outer endsof apair of links '38, pivotally mounted at the upper end of the-post 1. This operating-lever 37 has its inner end reduced, as at 39,

. and `provided with an edge for passage through the aforesaid lower opening 9 of tre4 post 1 for engagement with tile teeth v4() of the rack 6, whereby upon operation of the lever 37 with the teeth of tl e rack tle 'latter may be elevated to cause a consequent pivotal movement of tle lever 32 upwardly to throw the inner shouldered end of the lever 32 r against the depending portion29 'of the movable jaw 21, and consequently throw the lattertoward the fixed jaw, according to the upward movement of the rack 6 through. the 'instrumentality of the operating-lever 37. ln order to prevent accidental backward or downward movement of the rack 6, I'provide a spring-'actuatedv dog, mounted in the upper opening 8 of tlepostv 1 and designed to engage the teeth of tlfe rack 6.

; crank-lever having an inwardly-directed pro-` The heads 14 and 21 are held normallyl in spaced relation through the instrumentalityl of a helical spring 42, arranged at its oppo-" site ends in recesses 43 of the respective heads, and e'ach'head isprovided at its outer end with oppositely-disposed arms 44 and 45 and 47 and 48 respectively. These arms are secured to the outer faces of the walls of the aforesaid overhanging 'flanges in any suitable manner and are curved, as shown. s The oppositely-disposed arms each have aperforation 50 in itsv outer end for the reception of the respective Acrank-levers 50 and 51, each jection52 and'53, respectively, the inwardlydirectedfprojection 53 contacting with the upper downwardly-curved edge portion 54 of the side member 10 to limit the swinging of the 'crank-lever 51, while the opposite crank-lever 50 has its inner projection 52 designed to contact with the curved 44 ofthe fixed head 14, whereby the downwardswinging movement ofthe crank-levers is limited. Secured to the portion 55 of the respective crank-levers is a pairof springs 56, each spring having its oppositeend secured inaneye 57 at the outer-end of each-of the aforesaid clamping-jaws 17 and 18 and 24 and 25, respectively, whereby the jaws 'may be moved inv'vardly and outwardly of the guides formed by said overhanging flanges.

Formed in the upper face of the fixed and movable heads 1.4 and 21 at their inner ends is a depression 58, in which a bridge-platementality'of vthe expanding. of the aforesaid springs 56 upon said outward movement of the crank-levers. Obviously, therefore, by reason of the movement of the headsr land 'jaws as just'descri-bed there is an even distribution of wedgingaction upon 'the tire.

In order to positively'hold the vehiclewheel uponthe device prior to and after the engagement therewith of the jaws and the inward movement of the movablek head with respect to the fixed head, l provide a pair Iof pivctally-mountedA arms 60 and 61, which are pivoted 'at the lower edges of the respective side members 10 and 11 and rnear one end thereof. Each arm has its upperl end screw-threaded for the l engagement therewith of an elongate-d nut 63, designed to 4engage the inner face of the' felloe ofthe wheel,

and thereby hold the wheel in proper-position.

A tire-shrinker comprising end posts, side members connecting the end v"posts, a fixed head mounted upon one `of the posts; a movable head mounted upon tlie side members, a rack-bar mounted within the other post, a lever connected at one end with the-lower end of the rack-bar, and lat the otherend with the movable head, and `an operatinglever pivotally mounted upon the lastnamed post for engagement with the rackbar to'elevate the latter and throw the inner end of the aforesaid Alever into engagement with the movable head tomove thelatter toward the fixed head.

ln testimony whereof I afiix my signature The operating-A lOO IOS

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